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65-625: Sheikh Ul Alam International Airport or Srinagar Airport ( IATA : SXR , ICAO : VISR ), also known as Budgam Airbase is an international airport serving Srinagar , the summer capital of the Indian union territory of Jammu and Kashmir . It is owned by the Indian Air Force with the Airports Authority of India operating a civil enclave at the airport and was designated as an international airport in 2005. The airport

130-711: A car lot , is a cleared area intended for parking vehicles. The term usually refers to an area dedicated only for parking, with a durable or semi-durable surface. In most jurisdictions where cars are the dominant mode of transportation , parking lots are a major feature of cities and suburban areas. Shopping malls , sports stadiums , and other similar venues often have immense parking lots. (See also: multistorey car park ) Parking lots tend to be sources of water pollution because of their extensive impervious surfaces , and because most have limited or no facilities to control runoff. Many areas today also require minimum landscaping in parking lots to provide shade and help mitigate

195-403: A pay and display system, where a ticket is purchased from a ticket machine and then placed on the dashboard of the car. Parking enforcement officers patrol the lot to ensure compliance with the requirement. Similar to this is the system where the parking is paid by the mobile phone by sending an SMS message which contains the license plate number. In this case, the virtual cashier books

260-567: A new airport is built, replacing the old one, leaving the city's new "major" airport (or the only remaining airport) code to no longer correspond with the city's name. The original airport in Nashville, Tennessee, was built in 1936 as part of the Works Progress Administration and called Berry Field with the designation, BNA. A new facility known as Nashville International Airport was built in 1987 but still uses BNA. This

325-494: A part of a larger expansion project at a cost of ₹ 1.3 billion (US$ 16 million), initiated by the Government of India and was inaugurated on 14 February 2009. There are nine parking bays with five connected by aerobridges with the terminal. In 2019, the authorities planned to construct a new airport terminal handling only international flights with domestic flights operating from the older terminal. In September 2021,

390-460: A payment method, and the system remembers where a vehicle is parked and allows users to share a parking session with Facebook friends. Users may also, for a nominal monthly fee per registered car, subscribe to reminders that text alerts shortly before metered time expires, and in some municipalities, users may buy additional metered time via cellphone. Philadelphia, encourages parking space turnover by charging escalating parking fees when metered time

455-1036: A small island of trees was present, temperatures only reached 89 °F (32 °C). It also found that a further 1 °F temperature reduction could be obtained for every additional canopy tree planted. More recently, parking lots have been seen as prime real estate for installing large solar panel installations, with the additional benefit of shade for vehicles parked underneath. A parking lot needs fairly large space, around 25 square meters or 270 square feet per parking spot. This means that lots usually need more land area than for corresponding buildings for offices or shops if most employees and visitors arrive by car. This means covering large areas with asphalt. Some lots have charging stations for battery vehicles . Some regions with especially cold winters provide electricity at most parking spots for engine block heaters , as antifreeze may be inadequate to prevent freezing. Parking lots are responsible for many greenhouse gas emissions because they increase driving and contributing to

520-466: A test flight was conducted for night landing by Directorate General of Civil Aviation . On 19 March 2021, commercial night flying operations at the airport started. In February 2009, Air India Express started weekly flights to Dubai , the first regularly scheduled international flight from Srinagar. However, due to low demand from passengers, the flights were terminated in January 2010. The airport

585-533: A way to add more housing for residents while encouraging the use of public transit. Parking lots designed specifically for bicycle parking are also becoming more prevalent in response to increased environmental and health consciousness. These may include bicycle parking racks and locks, as well as more modern technologies for security and convenience. For instance, a growing number of bicycle parking lots in Tokyo include automated parking systems . Efforts to reduce

650-509: Is GSN and its IATA code is SPN, and some coincide with IATA codes of non-U.S. airports. Canada's unusual codes—which bear little to no similarity with any conventional abbreviation to the city's name—such as YUL in Montréal , and YYZ in Toronto , originated from the two-letter codes used to identify weather reporting stations in the 1930s. The letters preceding the two-letter code follow

715-401: Is added. Another app, Streetline, whose primary purpose is to help motorists find open parking spots using their smartphones, includes a timer, so users can get back to a parking meter before it expires, and a filter that lets users choose between on-street and off-street parking spaces; it also connects to the phone's camera so a user can take a photograph of their car. Other lots operate on

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780-617: Is available. However, many railway administrations have their own list of codes for their stations, such as the list of Amtrak station codes . Airport codes arose out of the convenience that the practice brought pilots for location identification in the 1930s. Initially, pilots in the United States used the two-letter code from the National Weather Service (NWS) for identifying cities. This system became unmanageable for cities and towns without an NWS identifier, and

845-523: Is different from the name in English, yet the airport code represents only the English name. Examples include: Due to scarcity of codes, some airports are given codes with letters not found in their names: The use of 'X' as a filler letter is a practice to create three-letter identifiers when more straightforward options were unavailable: Some airports in the United States retained their NWS ( National Weather Service ) codes and simply appended an X at

910-671: Is governed by IATA Resolution 763, and it is administered by the IATA's headquarters in Montreal , Canada. The codes are published semi-annually in the IATA Airline Coding Directory. IATA provides codes for airport handling entities, and for certain railway stations. Alphabetical lists of airports sorted by IATA code are available. A list of railway station codes , shared in agreements between airlines and rail lines such as Amtrak , SNCF , and Deutsche Bahn ,

975-471: Is groundwater abstraction 'downstream' for potable water supply. Many areas today also require minimum landscaping in parking lots. This usually principally means the planting of trees to provide shade. Customers have long preferred shaded parking spaces in the summer, but parking lot providers have long been antagonistic to planting trees because of the extra cost of cleaning the parking lots. Paved surfaces contribute to heat islands in two ways. The first

1040-513: Is in conjunction to rules aimed to avoid confusion that seem to apply in the United States, which state that "the first and second letters or second and third letters of an identifier may not be duplicated with less than 200 nautical miles separation." Thus, Washington, D.C. area's three airports all have radically different codes: IAD for Washington–Dulles , DCA for Washington–Reagan (District of Columbia Airport), and BWI for Baltimore (Baltimore–Washington International, formerly BAL). Since HOU

1105-533: Is located about 12 km (7.5 mi) from the city of Srinagar. There is a car park with 250 spaces. The government provides a paid bus service between the airport and the tourist reception center near Lal Chowk , while the Airports Authority of India operates a free bus service between the terminal and the airport entrance gate one km (0.62 mi) away. The airport is also served by taxis and car rental agencies, which have their booths outside

1170-549: Is located in Budgam , about 12 km (7.5 mi) south of Srinagar. It has an integrated domestic and international terminal with one asphalt runway. Srinagar airfield was established by the Indian Air Force . During the Indo-Pakistani War of 1947 , the airport received an airlift of Indian army troops to prevent Pakistan army from capturing Srinagar . Although the airport was small and lacked landing aids,

1235-543: Is not followed outside the United States: In addition, since three letter codes starting with Q are widely used in radio communication, cities whose name begins with "Q" also had to find alternate codes, as in the case of: IATA codes should not be confused with the FAA identifiers of U.S. airports. Most FAA identifiers agree with the corresponding IATA codes, but some do not, such as Saipan , whose FAA identifier

1300-546: Is small for the car owner and the owner is always responsible. The United Kingdom has two types of car parking: either on public or on private land. The police will investigate any reported accident on public land but have no legal obligation and will not do so on private land. Public road is defined by the Road Traffic Act 1972 and (Amendment) Regulations 1988 S.I. 1988/1036 as: "Road", in relation to England and Wales , means any highway and any other road to which

1365-462: Is the low moisture content of paving and building materials. Such materials are watertight, so no moisture is available to dissipate the sun's heat through evaporation. Tree planting has been shown to significantly reduce temperatures in open, paved areas. In one study in Alabama , daytime summer temperatures of 120 °F (49 °C) were recorded in the centre of a bare parking lot, whereas where

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1430-528: Is through excessive accumulation of heat. Dark materials and the enclosed canyons created by city buildings trap more of the sun's energy. The reflection rate of paving compared to natural surfaces is important as higher reflectance means cooler temperatures. Black pavements, the hottest, have solar reflectances of 5 to 10 percent. Lighter pavements have solar reflectance rates of 25 percent or higher. Reflectance values for soils and various types of vegetation range from 5 to 45 percent. The second cause of heat islands

1495-524: Is to use permeable paving surfaces, such as brick , pervious concrete , stone , special paving blocks, or tire -tread woven mats. These materials allow rain to soak into the ground through the spaces inherent in the parking lot surface. The ground then may become contaminated in the surface of the parking lot park, but this tends to stay in a small area of ground, which effectively filters water before it seeps away. This can however create problems if contaminants seep into groundwater , especially where there

1560-416: Is used for William P. Hobby Airport , the new Houston–Intercontinental became IAH. The code BKK was originally assigned to Bangkok–Don Mueang and was later transferred to Suvarnabhumi Airport , while the former adopted DMK. The code ISK was originally assigned to Gandhinagar Airport (Nashik's old airport) and later on transferred to Ozar Airport (Nashik's current airport). Shanghai–Hongqiao retained

1625-411: Is widely seen as disruptive to walkable urban fabric, maximizing convenience to each individual building but hampering foot traffic between them. Large paved areas have been called "parking craters", "parking deserts", and similar terms, emphasizing their "depopulated" nature and the barriers they can create to walking movement . Urban planning policies such as parking minimums and maximums can influence

1690-618: The Aviation Minister announced that the existing terminal will be expanded from the present 25,000 m (270,000 sq ft) to 63,000 m (680,000 sq ft) at a cost of ₹ 1,500 crore (US$ 180 million). Other amenities include a food court, food outlets, handicraft shops, ATMs , currency exchanges and WiFi . There is a single asphalt runway, 13/31, with dimensions 3,685 by 46 metres (12,090 ft × 151 ft). It has been equipped with an instrument landing system since February 2011. In August 2018,

1755-571: The Canadian transcontinental railroads were built, each station was assigned its own two-letter Morse code : When the Canadian government established airports, it used the existing railway codes for them as well. If the airport had a weather station, authorities added a "Y" to the front of the code, meaning "Yes" to indicate it had a weather station or some other letter to indicate it did not. When international codes were created in cooperation with

1820-630: The Kargil War in 1999, the airport was taken over completely by the Air Force and civilian flights were stopped. In March 2005, the airport was granted international status by the Indian government. In 2006, the airport was renamed Sheikh-ul-Alam International Airport after the Sheikh-ul-Alam , a Kashmiri Sufi saint. In 2020, BJP demanded the airport to be renamed as Major Somnath Sharma International Airport after Major Somnath Sharma ,

1885-510: The U.S. For example, several airports in Alaska have scheduled commercial service, such as Stebbins and Nanwalek , which use FAA codes instead of ICAO codes. Thus, neither system completely includes all airports with scheduled service. Some airports are identified in colloquial speech by their IATA code. Examples include LAX and JFK . Car park A parking lot ( American English ) or car park ( British English ), also known as

1950-481: The United States, because "Y" was seldom used in the United States, Canada simply used the weather station codes for its airports, changing the "Y" to a "Z" if it conflicted with an airport code already in use. The result is that most major Canadian airport codes start with "Y" followed by two letters in the city's name (for example, YOW for O tta w a , YWG for W innipe g , YYC for C algar y , or YVR for V ancouve r ), whereas other Canadian airports append

2015-452: The added material in the structure to elevate them for cars to park underneath. They can also be useful at protecting cars from extreme weather and the Sun 's heat. Parking lots tend to be sources of water pollution because of their extensive impervious surfaces . Virtually all of the rain (minus evaporation) that falls becomes urban runoff . To avoid flooding and unsafe driving conditions,

Srinagar Airport - Misplaced Pages Continue

2080-565: The airlift was still carried out successfully on 27 October 1947. In September 1965, the Srinagar Airport was subjected to an air raid amid the Indo-Pakistani War of 1965 , which left some aircraft damaged. In 1979, the Airports Authority of India established a civil enclave at the airport. The terminal was modified in February 1998 to be able to handle international Hajj flights which started operating from January 2002. During

2145-440: The airport itself instead of the city it serves, while another code is reserved which refers to the city itself which can be used to search for flights to any of its airports. For instance: Or using a code for the city in one of the major airports and then assigning another code to another airport: When different cities with the same name each have an airport, they need to be assigned different codes. Examples include: Sometimes,

2210-418: The airport's former name, such as Orlando International Airport 's MCO (for Mc C o y Air Force Base), or Chicago's O'Hare International Airport , which is coded ORD for its original name: Or char d Field. In rare cases, the code comes from the airport's unofficial name, such as Kahului Airport 's OGG (for local aviation pioneer Jimmy H ogg ). In large metropolitan areas, airport codes are often named after

2275-479: The airport. There are mobile apps providing services for the reservation of long-term parking lot spaces similar to online or aggregate parking facility booking services. Some long-term parking mobile apps also have turn-by-turn maps to locate the parking lot, notably US and UK based ParkJockey . Solar canopy parking lots are solar arrays installed on canopies in parking lots. They are up to twice as expensive to install as normal open field solar arrays because

2340-565: The amount of space dedicated to parking lots for diminishing the dependence on cars, has been taken in Beijing , Mexico City , Delhi and different cities in California . Portland , Minneapolis , Austin abolished the requirement for parking minimum. As of 2 November 2023, Austin (Texas) is the biggest city in the US that has done so - for encouraging, walking, biking, public transit, lowering

2405-401: The boom. A more modern system uses automatic pay stations, where the driver presents the ticket and pays the fee required before returning to their car, then drives to the exit terminal and presents the ticket. If the ticket has not been paid for, the boom barrier will not raise, which will force the customer to either press the intercom and speak to a staff member, or reverse out to pay at

2470-885: The car and the time when the message is sent, and later a new SMS message must be sent whenever the time is due. The actual payment is then made via the mobile phone bill. Since 1978 in the United Kingdom , it has been possible to pre-book parking with specialist companies, such as BCP . This is prevalent at all airports, major ports and cities. Modern parking lots use a variety of technologies to help motorists find unoccupied parking spaces using parking guidance and information system, retrieve their vehicles, and improve their experience. This includes adaptive lighting, sensors , indoor positioning system (IPS) and mobile payment options. The Santa Monica Place shopping mall in California has cameras on each stall that can help count

2535-640: The cashiers at a separate cashier's office or counter (which are often located elsewhere from the entrances and exits of carparks). Such cashier's offices are called shroff offices or simply shroff in some parking lots in Hong Kong and other parts of East Asia influenced by the Hong Kong usage. If a ticket has not been paid, the barrier will not raise. In recent years, cashiers and shroff officers have often been replaced with automated machines. Another variant of payment has motorists paying an attendant on entry to

2600-502: The code SHA, while the newer Shanghai–Pudong adopted PVG. The opposite was true for Berlin : the airport Berlin–Tegel used the code TXL, while its smaller counterpart Berlin–Schönefeld used SXF; the Berlin Brandenburg Airport has the airport code BER, which is also part of its branding. The airports of Hamburg (HAM) and Hannover (HAJ) are less than 100 nautical miles (190 km) apart and therefore share

2665-476: The cost of housing and increase the amount of housing units that can be built in the city territory. In Sweden and Denmark , there are legally two types of car parking, either on streets and roads, or on private land. A parking violation on streets is a traffic crime, resulting in fines. A parking violation on private land (also if owned by the city) is a contract violation and gives additional parking fee ( Swedish : kontrollavgift = check fee). The difference

Srinagar Airport - Misplaced Pages Continue

2730-834: The end. Examples include: A lot of minor airfields without scheduled passenger traffic have ICAO codes but not IATA codes, since the four letter codes allow more number of codes, and IATA codes are mainly used for passenger services such as tickets, and ICAO codes by pilots. In the US, such airfields use FAA codes instead of ICAO. There are airports with scheduled service for which there are ICAO codes but not IATA codes, such as Nkhotakota Airport/Tangole Airport in Malawi or Chōfu Airport in Tokyo, Japan. There are also several minor airports in Russia (e.g., Omsukchan Airport ) which lack IATA codes and instead use internal Russian codes for booking. Flights to these airports cannot be booked through

2795-799: The extent to which their paved surfaces contribute to heat islands . Many municipalities require minimum numbers of parking spaces for buildings such as stores (by floor area) and apartment complexes (by number of bedrooms). In the United States, each state's Department of Transportation sets the proper ratio for disabled spaces for private business and public parking lots. Modern parking lots use various technologies to enable motorists to pay parking fees, help them find unoccupied spaces and retrieve their vehicles, and improve their parking experiences. The effect of large-scale in-city parking has long been contentious. The replacement of historic structures by garages and lots has led to historical preservation movements in many cities. The massive acreage devoted to parking

2860-464: The first recipient of India's highest military decoration, Param Vir Chakra . The airport has an integrated terminal, handling both domestic and international flights. It covers 19,700 m (212,000 sq ft) and can serve 950 passengers at a time. The terminal is designed on the Himalayan theme and has a sloping roof to facilitate easier removal of snow. The terminal was constructed as

2925-557: The first three letters of the city in which it is located, for instance: The code may also be a combination of the letters in its name, such as: Sometimes the airport code reflects pronunciation, rather than spelling, namely: For many reasons, some airport codes do not fit the normal scheme described above. Some airports, for example, cross several municipalities or regions, and therefore, use codes derived from some of their letters, resulting in: Other airports—particularly those serving cities with multiple airports—have codes derived from

2990-478: The following format: Most large airports in Canada have codes that begin with the letter "Y", although not all "Y" codes are Canadian (for example, YUM for Yuma, Arizona , and YNT for Yantai , China), and not all Canadian airports start with the letter "Y" (for example, ZBF for Bathurst, New Brunswick ). Many Canadian airports have a code that starts with W, X or Z, but none of these are major airports. When

3055-597: The form of " YYZ ", a song by the rock band Rush , which utilizes the Morse code signal as a musical motif. Some airports have started using their IATA codes as brand names , such as Calgary International Airport (YYC) and Vancouver International Airport (YVR). Numerous New Zealand airports use codes that contain the letter Z, to distinguish them from similar airport names in other countries. Examples include HLZ for Hamilton , ZQN for Queenstown , and WSZ for Westport . Predominantly, airport codes are named after

3120-487: The international air booking systems or have international luggage transferred there, and thus, they are booked instead through the airline or a domestic booking system. Several heliports in Greenland have 3-letter codes used internally which might be IATA codes for airports in faraway countries. There are several airports with scheduled service that have not been assigned ICAO codes that do have IATA codes, especially in

3185-682: The location of a vehicle. Another alternative is to use smartphone applications that does inertial dead reckoning, detection of turns made by the car while driving indoor, correlations of travel time between turns, and machine learning algorithms, to infer the rough location of the parked car based on a map or floorplan. Online booking technology service providers have been created to help drivers find long-term parking in an automated manner, while also providing significant savings for those who book parking spaces ahead of time. They use real-time inventory management checking technology to display parking lots with availability, sorted by price and distance from

3250-417: The lot occupancy and find lost cars. In outdoor parking lots, GPS can be used to remember the location of a vehicle (some apps saves location automatically when turning off the car when a smartphone breaks communication with a vehicle's Bluetooth connection). In indoor parking lots, one option is to record one's Wi-Fi signature (signal strengths observed for several detectable access points) to remember

3315-518: The lot, with the way out guarded by a one-way spike strip that will only allow cars to exit. Parking meters can also be used, with motorists paying in advance for the time required for the bay they are parked in. Pango (a play on "pay and go" ), a company founded in Israel in 2007, created a mobile app that allows users to both find and pay for available metered parking; the app can also be used to pay for garage parking. Users' accounts are linked to

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3380-582: The lots are built to channel and collect runoff. Parking lots, along with roads, are often the principal source of water pollution in urban areas. Motor vehicles are a constant source of pollutants, the most significant being gasoline , motor oil , polycyclic aromatic hydrocarbons (PAHs), and heavy metals . are found in combustion byproducts of gasoline, as well as in asphalt and coal tar -based sealants used to maintain parking lots.) Many parking lots are also significant sources of trash which ends up in waterways. Treatment of pollution: Traditionally,

3445-612: The name of the airport itself, for instance: This is also true with some cities with a single airport (even if there is more than one airport in the metropolitan area of said city), such as BDL for Hartford, Connecticut 's B ra dl ey International Airport or Baltimore's BWI, for B altimore/ W ashington I nternational Airport ; however, the latter also serves Washington, D.C. , alongside Dulles International Airport (IAD, for I nternational A irport D ulles) and Ronald Reagan Washington National Airport (DCA, for D istrict of C olumbia A irport). The code also sometimes comes from

3510-416: The one they are located in: Other airport codes are of obscure origin, and each has its own peculiarities: In Asia, codes that do not correspond with their city's names include Niigata 's KIJ , Nanchang 's KHN and Pyongyang 's FNJ . EuroAirport Basel Mulhouse Freiburg , which serves three countries, has three airport codes: BSL, MLH, EAP. Some cities have a name in their respective language which

3575-439: The pay station or cashier booth. At some major airports' parking lots in the United States, a driver can choose to swipe a credit card at the entry ticket dispenser instead of taking a ticket. When the driver swipes the same credit card at the exit terminal upon leaving the lot, the applicable parking fee is automatically calculated and charged to the credit card used. In some parking lots, drivers present their tickets to and pay

3640-501: The proper ratio for disabled spaces for private business and public parking lots. Certain circumstances may demand more designated spaces. These reserved spaces are mandated by the Americans with Disabilities Act Accessibility Guidelines. Various forms of technology are used to charge motorists for the use of a parking lot. Boom gates are used in many parking lots. A customer arrives to the entry ticket machine by vehicle, presses

3705-408: The public has access, and includes bridges over which a road passes. There is also a House of Lords judgment on this matter. Civil enforcement officers enforce parking restrictions on public, council-run car parks. These include failure to purchase a ticket as payment (if available)/not parking in a marked bay/other offences. In the United States, each state's Department of Transportation sets

3770-577: The runoff has been shunted directly into storm sewers , streams , dry wells or even sanitary sewers . However, most larger municipalities now require construction of stormwater management facilities for new lots. Typical facilities include retention basins , infiltration basins and percolation trenches . Some newer designs include bioretention systems, which use plants more extensively to absorb and filter pollutants. However, most existing lots have limited or no facilities to control runoff. Alternative paving materials: An alternative solution today

3835-506: The same first and middle letters, indicating that this rule might be followed only in Germany. Many cities retain historical names in their airport codes, even after having undergone an official name/spelling/transliteration change: Some airport codes are based on previous names associated with a present airport, often with a military heritage. These include: Some airports are named for an administrative division or nearby city, rather than

3900-556: The size of private parking lots. Due to a recent trend towards more livable and walkable communities, parking minimums (policies requiring each building to have a minimum number of parking spaces) have been criticized by both livable streets advocates and developers alike. For a time, the British government recommended that local councils should establish maximum parking standards to discourage car use. American cities such as Washington, DC, are now considering removing parking minimums as

3965-500: The station code of Malton, Mississauga , where it is located). YUL is used for Montréal–Trudeau (UL was the ID code for the beacon in the city of Kirkland , now the location of Montréal–Trudeau). While these codes make it difficult for the public to associate them with a particular Canadian city, some codes have become popular in usage despite their cryptic nature, particularly at the largest airports. Toronto's code has entered pop culture in

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4030-861: The terminal. On 7 September 1965, amid the Indo-Pakistani War of 1965, four fighter jets of the Pakistan Air Force attacked the Srinagar airport. An Indian Air Force Douglas C-47 Skytrain and an Indian Airlines Douglas DC-3 were destroyed during the air raid. A Chicago Tribune article published the following day reported that one Indian aircraft and a Caribou transport of the United Nations observers headquarters were damaged. [REDACTED] Media related to Sheikh ul-Alam International Airport at Wikimedia Commons IATA airport code The assignment of these codes

4095-431: The ticket request push button, takes a ticket - which raises the barrier - and enters the parking lot. To exit the lot, the customer presents the ticket to a cashier in a booth at the exit and tenders payment, after which the cashier opens the boom gate. In 1954, the first automated parking lots were built where, for a monthly fee, a driver with a magnetic key card could enter and exit the parking lot by raising and lowering

4160-515: The two-letter code of the radio beacons that were the closest to the actual airport, such as YQX in Gander or YXS in Prince George . Four of the ten provincial capital airports in Canada have ended up with codes beginning with YY, including: Canada's largest airport is YYZ for Toronto Pearson (as YTZ was already allocated to Billy Bishop Toronto City Airport , the airport was given

4225-529: The use of two letters allowed only a few hundred combinations; a three-letter system of airport codes was implemented. This system allowed for 17,576 permutations, assuming all letters can be used in conjunction with each other. Since the U.S. Navy reserved "N" codes, and to prevent confusion with Federal Communications Commission broadcast call signs , which begin with "W" or "K", the airports of certain U.S. cities whose name begins with one of these letters had to adopt "irregular" airport codes: This practice

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